52 Carl Bovallius, The Oxycep'halids. 



and nearly as long as the three following joints together; the carpus is 

 not half as long as the tibia, and much shorter than half the metacarpus. 

 The seventh pair reach to the apex of the femur of the sixth pair. 



The first two pleonal segments together are almost as long as the 

 whole peraeon. The lateral parts of all the segments are rounded below 

 aùd obtuse behind. 



The first segment of the urus is as long as the last coalesced, 

 which is considerably shorter than the telson. 



The outer ramus of the first pair is narrow, falci-form, the inner 

 is elongate and sharp-pointed. The rami of the second pair are 

 narrowly elongate and sharp-pointed, the inner ramus being more than 

 twice as long and broad as the outer. The inner ramus of the third 

 pair is constricted in the middle, the upper half is ovate, and the lower 

 half narrow, linear, and truncated at the apex. 



Colour. Greyish white, whitout spots, the eyes deep red. 



Length. 4 — 6 mm. 



Hab. The »Challenger» specimen was taken in the Atlantic, ofï' the coast 



of Africa, at Lat. 11" 5' N. and Long. 18» 15 W. (Stebbing). I 

 have taken several specimens in the tropical region of the At- 

 lantic, from Long. 20» to 65» W. 



3. Simorliyiicliotus Lilljeborgi, C. Bovallius, 1887. 



PI. I fig. 1—7; and p. 26, fig 25; p. 27, fig. 28; p. 28, fig. 34; p. .S2, 

 fig. 50; p. H6, fig. 67; p. 87, fig. 70; and p. 39, p. 76. 



The name is given in honour of Prof. W. Lilljeborg. 



Digan. The head is scarcely produced, is rounded, and longer than the 

 first three perœonal segments together. 



The lower front corner of the first flagellar joint of the first 

 pair of antennae in the male is produced into a short process, 

 which is less than half as long as the breadth of the joint. 



The perœon is much longer than the pleon. 



The femur of the first and second pairs of perœopoda is quite 

 as long as all the following joints together. The femur of 

 the seventh pair is nearly as long as that of the sixth, and 

 is somewhat narrower than the femur of the fifth pair. 



The peduncle of the first pair of uropoda is much shorter than 

 the inner ramus, and also shorter than the outer. The outer 



